I'm gonna go against the grain. I really think that's a hammer. What gives it away is that there aren't any bulbs on the sides of the branches... Just at the tips. And the tips are generally one piece.
This is what frogspawn looks like: See, lots of bulbs all down the stalks... Not just at the tips.
See how there are bulbs all up and down the stalks? And they are round?
The tips of your coral are club-shaped.
Here is a hammer: Club-shaped tips, and only at the ends of the stalks, not all down the length of them.
Maybe the heads of yours aren't as defined as most hammers, but they defnitely are not round, and the structure of the stalks indicates it's a "weak hammer" and definitely not a frogspawn.